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|Title:||Rotational Energy Distributions of Benzene Liberated from Aqueous Liquid Microjets: A Comparison between Evaporation and Infrared Desorption|
|Citation:||Australian Journal of Chemistry, 2006; 59(2):104-108|
|Publisher:||C S I R O Publishing|
|Olivia J. Maselli, Jason R. Gascooke, Sarah L. Kobelt, Gregory F. Metha and Mark A. Buntine|
|Abstract:||We have measured the rotational energy distribution of benzene molecules both evaporated and desorbed by an IR laser from a liquid microjet. Analysis of the 6₀¹ vibronic band of benzene has shown that the benzene molecules evaporating from the liquid microjet surface have a rotational temperature of 157 ± 7 K. In contrast, the rotational temperature of benzene molecules desorbed from the liquid microjet by a 1.9 μm laser pulse is 82 ± 5 K. However, in both cases careful inspection of the spectral profiles shows that the experimental rotational distributions are non-Boltzmann, displaying an underpopulation of high rotational states and a relative overpopulation of the low rotational states. The non-equilibrium evaporation and desorption spectral profiles are consistent with a model that involves transfer of internal energy into translation upon liberation from the condensed phase.|
|Description:||Copyright © 2006 CSIRO|
|Appears in Collections:||Chemistry publications|
Environment Institute publications
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